STP617

    Effect of Time at Load on Fatigue Response of [(0/ ± 45/90)s]2 T300/5208 Graphite-Epoxy Laminate

    Published: Jan 1977


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    Abstract

    Results of an experimental program, designed to test a time at load fatigue failure hypothesis for composites, are discussed. In order to minimize the influence of various test and material variables, testing was performed using a trapezoidal loading waveform with constant loading rates and sufficiently long hold times at load to minimize the effect of hysteresis heating. The results indicate that the fatigue life of [(0/ ±45/90)s]2 T300/5208 graphite-epoxy specimens can be explained by using time at load as a fatigue criterion.

    Keywords:

    composite materials, fatigue test, graphite composite, epoxy laminates


    Author Information:

    Sendeckyj, GP
    Aerospace engineers, Structural Mechanics Division, Air Force Flight Dynamics Laboratory, Wright-Patterson Air Force Base, Ohio

    Stalnaker, HD
    Aerospace engineers, Structural Mechanics Division, Air Force Flight Dynamics Laboratory, Wright-Patterson Air Force Base, Ohio


    Paper ID: STP26934S

    Committee/Subcommittee: D30.04

    DOI: 10.1520/STP26934S


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